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Advisory record · GHSA-jv2h-4p9v-wf5w

ouroboros-ai: Incomplete fix of CVE-2026-47211: untrusted project .env can still reach RCE via omitted execution-routing keys

CVSS 8.4 HighEPSS 0.0024 · 15th percentile

Published by the GitHub Advisory Database at 19 Jun 2026, 15:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
ouroboros-aiPyPI<0.42.10.42.1
Identifiers
GHSA-jv2h-4p9v-wf5w · CVE-2026-66065
Weakness (CWE)
CWE-15 · CWE-94
Tags
Published
19 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Ouroboros-ai versions before 0.42.1 are vulnerable. An incomplete fix for CVE-2026-47211 left several execution-routing keys out of the untrusted `.env` denylist, and the working-directory MCP roster was also auto-loaded. A user who runs Ouroboros inside a malicious cloned repository can therefore have arbitrary commands executed, and can also weaken the approval gate. Upgrade to 0.42.1, which adds the missing keys and removes cwd auto-discovery. Until then, do not run Ouroboros from untrusted repository directories, and remove any project `.env` and `./.ouroboros/mcp_servers.yaml` first.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.4 High 4.0 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0024, the 15th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.